Explosion

Packet ID	Direction
0x3C	Clientbound

Used to tell the client about where an explosion occured and what blocks were destroyed due to it. This spawns the explosion particles and plays the sound as well.

Clientbound

Field	Type	Description
X	Double	The X position of the explosion
Y	Double	The Y position of the explosion
Z	Double	The Z position of the explosion
Explosion Radius	Float	The radius of the explosion
Number of Destroyed Blocks	Integer	The number of destroyed blocks
Destroyed Blocks	Byte Array	The offsets of each destroyed block

The Destroyed Blocks Array has a format of (X,Y,Z) as bytes. These are added onto the explosions origin position, which is converted to an Integer.

int destroyedBlockX = int(explosionX) + offsetX;
int destroyedBlockY = int(explosionY) + offsetY;
int destroyedBlockZ = int(explosionZ) + offsetZ;

Example Packet

Field	Value
X	51.0
Y	66.4
Z	-1642.4
Explosion Radius	3.0f
Number of Destroyed Blocks	2
Destroyed Blocks	(4, 5, 6), (1, 2, 3)